1977948 has 72 divisors (see below), whose sum is σ = 5870592. Its totient is φ = 549792.

The previous prime is 1977929. The next prime is 1977953. The reversal of 1977948 is 8497791.

1977948 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11761 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (81536).

2^1977948 is an apocalyptic number.

1977948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2935296).

1977948 is an abundant number, since it is smaller than the sum of its proper divisors (3892644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1977948 is a wasteful number, since it uses less digits than its factorization.

1977948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 226 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1977948 is about 1406.3953924839. The cubic root of 1977948 is about 125.5273295931.

The spelling of 1977948 in words is "one million, nine hundred seventy-seven thousand, nine hundred forty-eight".